If the difference between the circumference and radius of a circle is 37 cm, then the area of the circle is

If the radius of the circle is increased by 100%, then the area is increased by

If the perimeter and the area of a circle are numerically equal, then the radius of the circle is

The radius of a circle is 14 cm and the area of a sector is 102.7 sq. cm. The central angle of the sector is

If one angle of a triangle is 50° and difference between the remaining two angles is 30°, then the value of smaller angle is :

If the radii of circles A and B are in the ratio 1.5: 1, then the areas of the circles A and B will be in the ratio